4140 Steel M4 x .75 round head screw heat treated to grade 8 for maximum durability. For use on Hispano Suiza J-12 firewall.
Material: 4140, heat treat grade 8
Finish: Natural
Thread: M4 x .75
Thread length: 6mm
Length: 10mm
OD: 6mm
Length under head: 7mm
Head height: 4mm
